Sandstone screening device

The utility model discloses a sandstone screening device, which relates to the technical field of sandstone screening and comprises a base, a rotating motor is fixedly mounted on one side of the upper end of the base, the output end of the rotating motor is fixedly connected with a second gear, one side of the second gear is meshed with an annular rack, and the inner wall of the annular rack is fixedly connected with a screening net. And screening holes are uniformly formed in the surface of the screening net in a penetrating manner. Through the arrangement of a third gear and a cleaning rod, a rotating motor is started, a second gear is meshed with an annular rack, the annular rack drives the third gear to rotate, a rotating roller of the annular rack also rotates along with the third gear, the cleaning rod of the annular rack is meshed in a screening hole, sandstone stuck on the screening hole is ejected out, and therefore the sandstone stuck on a screening net is cleaned. Therefore, the screening efficienc